Boiler cleaner



y 2, 1931. N. SNOW ET AL 1, BOILER CLEANER Filed Sept. 15, 1924 7 Sheets-Sheet 1 1 I N VEN TORA [07777471 1187mm framfifiawers BY Czn'tisll awse WW 4494M. Wm

WM ATTORNEYS y 1931. N. SNOW ET AL ,454

BOILER CLEANER Filed Sept. 15, 1924 7 Sheets-Sheet 2 I N VEN TORfi 40mm? Aswan? Cvrfbls'llzawsp M y 1931. N. L. SNOW ET AL 1,805,454

BOILER CLEANE R Filed p 1924 7 Sheets-Sheet 5 JNVENTORJ librmanlfinaw [raw/f Bangers 443M ATTORNEYS May 12, 1931.

N. L. SNOW ET AL ,80 ,454

BOILER CLEANER Filed Sept. '15, 1924 7 Sheets-Sheet 4 8 INVENTORAS N A Snow A TTORNE Y5 May 12, 1931. N. 1.. SNQW ET AL 5 BOILER CLEANER 7 Sheets-Sheet 5 Filed Sept. 15, 1924 May 12, 1931.

N. L. sNow ET AL BOILER CLEANER Filed Sept. 15, 1924 7 Sheets-Sheet 6 #0771101 71 L-Snaw 1N VEN TORS Czrrc'sZL/Zaurse .6? Mid-m A a-56a, 4mm M9 4 TTORNEY,S

M y 2, 1931. N. 1.. SNOW ET AL 1,305,454

BOILER CLEANER Filed Sept. 15, 1924 7 Sheets-Sheet 7 Ilflllllllih INVENTORS I Patented May 12,1931

i'rfo STATES PATVEN OFFICE].

NORMAN L. SNOW, FRANK BOWERS, AND CURTIS L. HOWSE, F IlI)lEl'.T.ROI'I., MICHIGAN, V ASSIGNORS TO DIAMOND POWER SPECIALTY CORPORATION, OF DETROIT, MICHIGAN,

A CORPORATION OFMICI-IIGAN BOILER CLEANER Application filed September 15, 1924. Serial No. 737,816.

of boiler tubes and showing a cleanerconstrncted in accordance with the teachings of this invention associated with the same;

Figure 2 is a cross sectional view of the same taken on line'22 of Figure 1; I

Figure 3 is a detail sectional view taken on line 33 of Figure 1;

Figure 4 is aview similar toFigure Qbut disclosing an alternative construction;

7 Figure 5 is a view in sideelevation' of a boiler tube with an alternative apparatus arranged'to clean the same; I

Figure 6 is a top View of the same;

Figure 7 is an end view thereof;

Figure 8 is a cross sectional view taker. on line 88 of Figure 5;

- Figure 9 is a plan view of the two lower rows of a bank of boiler tubes showing still another'form of the invention arranged for cleaning said tubes; 7 r

Figure 10 is a view of thesame in sectional elevation taken substantially on line 1010 of Figure 9 showing the opening through the wall of the boiler in section.

Figure 11 is a cross sectional View of the same taken substantially on line 11-11 of Figure '10 showing one of the impact'members in section;

Figure 12 is an end view of a motor-for energizing the apparatus disclosed in Figures 9, 10 and 11; p

Figure13 is a plan view ofthe same;

Figure 14 is a cross sectional view of said motor taken on line 14-14of Figure 12 and showing a portion of a fluid" discharge element driven by said motor.

Referring first to the construction shown in Figures 1 to3 inclusive, 1 designates a bank ofboiler tubes approximately horizontal, the two lower rows of said bank being designated 1 and 1 respectively. It is here to be noted that the accumulations of slag,-which it'is an object of the invention to remove, are most troublesome upon the two lowermost rows of the tubes of a boiler of the type shown. Below the header 2, to which the tubes 1, 1 and 1 are connected at corresponding ends, there is provided inthe wall 3 of the boiler an opening 3 controlled by a door 4 through which opening the apparatus now to be described may be inserted. This apparatus comprises a pipe 5 terminally provided with a nozzle 6 discharging in a direction transverse to said pipe. Adjacent said nozzle there ismounted upon said pipe animpact member orfhammer 7 formed by a plate,preferablyjmetallic, having its ends of the arcuate form indicated at 7 a and 7 topartially embrace one of the tubes 1 and one of the tubes 1". Thezpipe 5 serves as a handle whereby the impact member 7 may be inserted to the position of use shown in Figures 1 and 2. Insaid position theend portions of the member 7 are substantially transverse to the en gaged tubes 1 and 1 whilethe pipe 5 extends at an angle to said tubes which in the disclosed structure approximates 45 degrees.

Themid portion of the member 7 is offset in an angular relation to the end portions thereofias is clearly'shown in'Figure 1 so that said mid portion may be transverse to the pipe 5 while the end portions are transverse to theboiler tubes. Said mid portion is slotted as indicated at 7 c and within said slot. is arranged'a journal bearing 8 for the pipe 5,-said bearing being engaged at diametrically opposed points and swivelly mounted by a pair'of pins 9 carriedby the member 7 10 designates a collar upon the pipe 5 retaining the member 7 in proximity to the nozzle 6. 1 Bearing 8 has slight lateral freedom of movement between collar 10and collar 10 I located as shown adjacent the nozzle; a

- The pipe 5 is supplied with a cleaning and cooling fluid (preferably a liquid) through casing 11 by'a supply hose or pipe 12. 13 a journal bearing carried by said casing whereinthe pipe 5 isrotatable and through whichthe cleaning and cooling fluid is delivered to said pipe. Within the casing 11 there is disposed a motor 1% adapted to retatively drive the pipe 5 through a pair of gears also within said casing, said motor being energized in a suitable manner.

In the use of the described construction the cooling fluid is delivered to the pipe 5 and at the same time said pipe is rapidly rotated by the motor 14. The nozzle 6 rotating with said pipe alternatively discharges a cooling fluid upon the upper pipes 1 and the lower pipes 1". a constant reversal of the direction of its reaction to the discharging liquid and this reaction is transmitted through the journal bearing 8 to the impact member 7 causing the latter to vibrate up and down alternately striking the engaged tubes 1 and 1. The

rapid succession of blows towhich said tubes,

are thus subjected has the effect of breaking off the slag upon said tubes, which slaghas been rendered loose and. brittle through the cooling influence of the fluid discharged from said nozzle. Obviously, by giving the pipe 5 suflicient length the impact member 7 may be shifted to act upon the engaged boiler tubes throughout a desired portion of the length.

The above described apparatus may be somewhat modified as Figure 4 discloses, by providing a nozzle 15 having a double bend whereby the cleaning fluid is discharged tangentially andthe reaction of the discharge produces the rotation which, in the first described construction, is effected by the motor 14.

In that embodiment in the invention shown invention shown in Figures 5, 6, 7 and 8, 16 designates a delivery pipe for a cooling and cleansing fluid. To one end of said pipethere is rigidly secured the casing 17 having therein an oblong chamber 18 receiving the pair of enmeshed gears 20 and 21. The pipe 16-discharges into the chamber 18 at one side of the common axial plane of said gears and the casing 17 is formed with an outlet 22 which opens from said chamber 18 at the opposite side of said axial plane. The gears 20 and 21 are mounted upon stub shafts 23 which are journalled in the casing 17 and which carry similarly eccentric pins 24 projecting beyond the casing 17 at each side thereof. Upon the projecting ends of said pins thereis mounted an impact member comprising plates 25- at opposite sides of the casing engaged by said pins and spaced integral connections 26 between saidplates spaced above the casing'17. From opposite'ends of said casing guide arms 27 project upwardly.

In theme of the apparatus'just described the pipe 1'6'forms a handle whereby the impact members 25, 26 and the driving means therefor'terminally'carried by said pipe may be inserted into operative engagement with the boiler tube 27 to be cleaned The arms 27 be ngadapted to engage opposite sidesof said holler tube guide said impact member into a The rotation of said nozzle causes" proper working engagement with said tube. A cleansing fluid, preferably liquid, being now delivered through the pipe 16 is discharged from the outlet 22 against the boiler tube to be cleaned, the gears 20 and 21 are reversely driven in the direction as indicated by the arrows in Figure 8 by said fluid as it flows through the chamber 18 from the inlet of the latter to said outlet, the pins 24 being thus orbitally driven in opposite directions subjecting the impact members 25 and 26 to a continuous oscillation causing the members 26 of said impact member to alternately strike opposite sides of the boiler tube. The rapid succession ofreversely acting blows to which the engaged tube 27 is thus subjected serves to dislodge from said tube the particles of slag which have been previously loosened and made brittle by the cooling effect of the fluid discharged from the outlet 22. As in the first described construction the pipe 16 may be shifted longitudinally to move the described impact member lengthwise upon the engaged boiler tube so as to act upon the latter throughout the desired length.

Describing now that form of the invention shown in Figures 9 to 14 inclusive, 28 and 28 designate the two lowermost rows of a bank of boiler tubes. The tubes of the two rows are relatively staggered as is common practice. That is to say, the tubes of each row will extend substantially opposite the spaces between the tubes of the other row. Transversely beneath the lower row of tubes 28 there is extended an oscillatory pipe 29 which functions both to deliver a cooling and,

cleaning fluid to the tubes 28 and 28 and also to subject said tubes to a succession of blows for dislodging slag and the like therefrom.

Said pipe enters the boiler through an open-.

ing 30 in the wall 31 thereof, and one (or more) bearings 32 journaling said pipe is carried by one or more of the boiler tubes. Upon the pipe 29 within the boiler is mounted a plurality of hammers or impact members 33 and 84, the hammers 33 being relatively long and being adapted to project between the tubes 28 of the lowermost row to'engage the tubes of the row 28. The relatively short hammers 34 are respectively adapted to engage the lowermost tubes 28, these hammers 34 being mounted upon the pipes 29 alternate with the hammers 33, the mounting of all of said hammers being independent. To effect this mounting each hammer is formed upon its supported end with an integral sleeve 35 which loosely embraces the pipe 29. A drive connection: from said pipe to each hammer is established by apin 36 rigidly mounted in said pipe and projecting outwardly into-a circumferentially elongated slot 37 in the sleeve 35 mounting said hammer. This connection provides for a limited lost motion circumferentially between each hammer and the pipe 29, the utility of which will presently appear... Within each hammer 33 and 34 there isdisposed a discharge nozzle 38 rigidly carried by andopening from the pipe 29. The interior opening of each of said hammers exceeds the diameter of said nozzles in a direction circumferential about the pipe 29sufliciently to permit the lost motion movement of said hammers relative to said pipe, thus permitting the hammers to strike a swinging blow against the slag dep-ositson the boiler tubes. Also the fluid outlet of each hammer is suiiiciently elongated circumferentially of the pipe 29 to permit a free discharge of fluid from the nozzle within said hammer inany position that said nozzle may assumerelative to said hammer. The ends of the hammers 33 and 34-are formed with approximately spherical heads 39 which provide the striking faces to engage the boiler tubes.

Considering the operation of this form oi the invention as so far described, it isto be understood that the pipe '29 is subjected to an ular oscillation by" a means, whichwill presently be described, whereby'the hammers V 33 and 34 are simultaneously swung upwardly to the full line positions shown in Figure 11 in which positionssaid hammers have impact 7 with the boiler tubes 28 and 28 and are swung downwardly to the dash line shown in said figure. In all positions of said nozzles the cooling fluid is being delivered by the pipe 29 to the nozzles 38 and'during a major portion of the travel of said nozzles, said fluid is discharging uponthe tubes 28 and 28, cooling the slag deposits on saidtubes and thereby causing said deposits to. flake and loosen. Provision is made, as will-hereinafter appear, for locking the pipe 29,'when it is actuating the hammers 33 and 34 upwardly, at a velocity exceeding-that of said pipe when said hammersare being downwardly actuated thereby. This permits a prolongation of the-period during which the nozzles are discharging cooling fluid upon the tubes 28 and 28 between the impact strokes. As willghereinv after appear,provision is made for terminating the angular travel of the pipe 29 in a direction actuating thehammers 33 and 34 upwardly just prior to engagement'of the boiler tubes by'said hammers so that the final impact of said hammers with the tubes occurs solely under momentum ofjsaid hammers through their lost motion travel provided for by slotting the openings 37 for receiving the pins 36. This engagementof the ham mers with the boiler tubes, responsive solely to'momentum of said hammers, insures that all of the hammers will be permitted to en-' gage the opposite boilertubes despite-any irregularities in the relative positioning in a vertical direction 'of'the tubes of each row. By providing the pins 36 to limit lost motion of the hammers relative to. the pipe29the nozzles 38 are relieved of any stress due to such lost motion and consequently may be of p a light construction.

There will nowbe described a means for oscillating the pipe 29, for delivering a fluid to said pipe, and'for difierentiating between the-velocities ofthe angular travel of said pipe in reverse directions. To the wall 31 there is exteriorly secured a head 40 in which the outer end ofthe pipe 29 is journaled, said pipe being formedwithin said head with a a direction transverse to the vertical axial I} plane of the pipe 29, said pistons being respectively formed with racks 48 and 49 in mesh with'saidpinion. 50 and 51 designate parallel upperand lower cylindrical portions of the head 40'and 52 and 53 designatecylindrical chambers in said portions wherein said pistons reciprocate. The upper cylinder 50 has formed in its upper portion a cylindrical chamber 54, considerably less in diameterthan the piston chamber 52, and with; in said chamber 54 a-piston-valve 55 is arranged =to reciprocate. Said valve as will presently appear, serves to control the admission of an energizing fluid to the ends of the piston chamber 52. Each end portion of the valve 55 is formed with an annular port 56 and 56* respectively. Between the valve chamber 54 and pistonchamber 52 longitudinalfluid'passages 58, 59, 59, 60,60, 61 and 61 are formed in the cylinder 50. The passage 58 at its middle point is adapted to receive at supply of steam from the principal steam passage 42 through the passage 62. At

its extremities said passage 58 is connected by transverseports 63 and 63 with the piston valve'chamber 54. The two passages 59 and 59 are aligned and extended toward each other from the ends of the cylinder 50. Said passages, at their remote ends, communicate through ports 64 and 64 m the cylinder heads 5O with theends of the valve chamber 54.

ther communicate through ports 67 and 67 a with the piston valve chamber 54. The two passagestil and 61 are aligned withthe passages -60and 60? in the end portionsof the The adjacent ends of said passages 59 and 59 V cylinder 50, and have their inner ends communicating with the valve chamber 54 through ports 68 and 68 and their outer ends connected through ports 69 and 69 in the cylinder heads with the piston chamber 52. The top portion ofthe piston 46 is formed with a shallow longitudinal channel 70, terminating short of the ends of said piston and communicating with both ports 65 and 65 except in limiting positions of said piston. In a central upward extension 71 of-the cylinder 50 there is mounted a coil spring 71 urging a triangular detent 7 2 into either of two V-shaped notches 73 and 74 in the top of the piston valve 55, according to the limiting position occupied by said valve.

Considering the operation of said motor as so far described, assuming that the parts initially have the position shown in Figure 12, upon a fluid under pressure being admitted to the passage 42, a portion of said fluid flows through the passage 62 to the longitudinal passage 58. YVith the valve in its righthandlimiting position, as shown, the port 63 is closed by said valve, while the port 63 provides for a flow of fluid from the passage 58 to the annular port 56 and from the latter port through the port 68 to the passage 61 whence said fluid enters, by way of the port 69, the right-hand end of the piston chamber 52 from which it passes through the port 65 to the passage 59. From the latter passage, the fluid flows through the port 64 to the right-hand end of the valve chamber 54 forcing the valve 55 to the left. In this new position said valve closes the port 63, and places the two ports 67 and 68 in communication, thus, permitting the right-hand end of the chamber 52 to exhaust through the port 69", passage 61, ports 68, 56 and 67 and passage 60 and chamber 66. From said chamber the exhaust steam flows through consecutive passages 7 5 (see Fig. 14) and 76, whence it may discharge into the boiler setting. Also, in the new position of said piston valve, the port 56 places the left-hand ports 63 and 68 in communication whereby steam flows from the passage 58 through the ports 63, 56 and 68 to the passage 61 and through the port 69 to the left-hand end of the chamber 52 whereby the piston 46 is actuated to its right-hand limiting position (not shown). In said position the port is uncovered and steam then flows from the left-hand end of the chamber 52 through said port to the passage 59 and thence through the ports 64 to the left-hand end of the chamber '54 forcing the valve 55 again to its right-hand position, as shown in Figure 12. Thus a continuous reciprocation of the piston 46 in chamber 52 is effected, as long as a cleaning fluid is admitted to the passage 42. The two ports 65 and 65, together with the'channel 70 insure a venting of either end of the piston chamber 52, as soon as'the piston 46 has commenced its travel toward such ends, so that when the piston valve follows in a movement toward said end it may move quite freely.

The lower piston 47 forms a means for differentiating between the velocity of travel of the pinion 45 in opposite directions. Thus, the chamber 53 receiving said piston 47 is filled with oil or the like and reciprocation of said piston can only occur, as said oil is transferred from one end of the chamber 53 to the other through a. longitudinal connecting passage 78. The ends of said passage and of the chamber 53 communicate through ports 76 which are regulably controlled by check valve 7 7 This check valve functions as follows: Pressure of oil in chamber 78 lifts pin 77 from its seat, working against the compression of spring 80. As pin 77 lifts from its seat, oil passes through the ported ring 82 attached to pin 77, through channel 76 to the piston chamber 53. On the return of oil from cylinder 53 through this valve to passage 78, it is desired to secure a much slower rate of flow of the oil through the valve, thisrate also being adjustable. When piston 47 is travelling towards the right hand side, the oil is flowing at a relatively good rate of speed through the check valve from passage 78 towards the left hand end of cylinder 53. A relatively slow rate of flow of the oil through the valve, and hence relatively slow movement of piston 47 from right to left of cylinder 53 is secured as follows: On the return stroke of piston 47, pin 77 is returned to its seat by spring 80. Sleeve 81'is cut oil at the line 85 as shown, partly exposing the hole 84 in pin 77. This hole leads to passage 86 in the pin, hence to channel 78. The amount of hole 84 that is uncovered to the flow of the oil is regulated by threading sleeve 81 into fixed member 83. This movement of sleeve 81 also regulates tension on spring 80, but this is made relatively small so that increased resistance offered by compressing of this spring. to the flow of oil through channel 78, is made relatively small. Hole 84 being relatively small to the area of passage through ring 82, the rate of flow of oil from left hand side of cylinder 53 to right hand side of same through channel 78, is also relatively small to the flow in the reverse direction.

The effect of this differential travel of the dash pot piston in opposite directions is to permit a relatively rapid upstroke of the hammers 33 and 34 while the downstroke thereof is required to be relatively gradual. While the motor oscillating the pipe 29 has been described as energized by a portion of fluid, which is discharged from said pipe, it is to be understood that a separate fluid may be employed, if desired, for energization of said motor.

2. In a boiler cleaner fora water-tube 1 boiler, means for discharging a cooling fluid upon theboiler tubes, and means for subjecting said tubes to asuccession of blows to dislodge deposits loosened by application of said fluid while the boiler is being normally operated. 1

3. In a boiler cleaner, the combination with a conductor for a'cleaning fluid, of a. common means mounted upon said conductor for discharging 'sald fluld upon a boiler part during operation ofthe boiler and for jarring said part to dislodge therefrom deposits loosened by said cleaning fluid.

4. In a boiler cleaner for a water tube boiler, the combination with an impact mem ber, of means for actuating said impact member into repeated contact with the outside of a water tube during operationof the boiler, and means for discharging a cooling fluid upon said tube. V

5. In a boiler cleaner, the combination with a fluid conductor and an impact-member thereupon, means for oscillating said conductor for subjecting a boilerparttorepeated blowsfrom the impactmember, said conductor having a provision for the deliv cry of a cooling fluid to the boiler part substantially at the pointoi impact.

ing said conductor to subject a boiler part to repeater blows of said impact member, and

means for delivering a cooling fluid through" said conductor and through said impact member upon said boiler part.

7 In a boiler cleaner, the combination with a plurality of boiler tubes, of impactmembers respectively engageable with said boiler tubes, said impact members being provided -with means. for discharging a coollng fluld adjacent said tubes, and means for actuating said impact members providing for a rapid travel of said members in one direction and a slower travel of said members in a second direction to prolong the discharge of fluid adjacent the tubes. 7

8. In a boiler cleaner, the combinatlon with a plurality of impact members engage able with boiler parts,of a common means for'actuating said members through the major portion of their impact strokes, said members being arranged to "complete said strokes under their own momentum,

9. Ina boiler cleaner, the combination with a plurality of impact members engageable with boiler parts, of a commonsupport for said members having a lost motion drive conn'ection'therewith, means for angularly ac-' tuating said support to drive said members in unison through a major portion of their impact strokes, said lost motion connection providing for completion of the impact strokes under the individual momentum of said members.

10. In a boiler cleaner, the combination with a member extending adjacent a plurality of boiler tubes, of a plurality of impact members carried by said member for engagement respectively with said boiler tubes, and means for; oscillating said member to repeat-. edly subject said tubes to blows of said impact members. I V

p 11. In a boiler cleaner,the combination with can impactmember of an actuating element for 5 mentwith said member adapting said member for impact with a boiler part under its own momentum. j I

12. In .a boiler cleaner, the combination with. an'impact member, of an oscillatory mounting for imparting impulses to said member, said impactmember having a lost Y motion connection with said mounting whereby the final impact travel ofsaid member is adapted to occur under momentum of said memberf" .13. In a boiler cleaner, the combination with an impact member having a discharge passage for a cooling fluid, of means for oscillatingsaid impact member to and from a boiler part, thes'aiddischarge passage being 6. Ina boiler cleaner, the combination with a fluid conductor and an impact member 4 mounted thereupon, of means for oscillat so arranged as to directa cooling fluid against said boiler part when the impact member is movedtoward the boilerpart,-and means for retarding travel of theimpact member -from members thereupon for engagement with:

boiler parts, said members having passages for the discharge or" a cooling fluid delivered to'said pipe, of means for oscillating said pipe, and means for differentiating the velocities of the pipe in reverse directions to thereby prolongthe' dischargeof fluid in one direction. I 7 I 15. In a boiler. cleaner, the combination with a conductor for a cleaning fluid and a discharge nozzle for said fluid carried by said conductor,of a hollow impact member mounted upon said conductor and inclosing said nozzle and means: for oscillating said conductor to drive said impact member.

16. In a boiler cleaner, the combination with a conductor for a cleaning fluid and a discharge nozzle for said fluid carried by said conductor, of a hollow impact member having a lost motion mounting upon said conductor and inclosing said nozzle and means for, oscillating said conductor to actuate said impact member, the latter having a clearance from said nozzle sufiicient to avoidinterter once by the nozzle with lost motion movement of the impact meinberf i 17; In a boiler cleaner, the combination with a conductor for a'cieaning fluid and a discharge nozzle for said fluid carried by said conductor,'of a hollow impact member havinga lost motion mounting upon said conductor and inclosing said nozzle, means for oscillating said conductor an'd'means other than said nozzle establishing alost motion drive connection to the impact member from theconductor.-

18. In a boiler cleaner, the combination with an impact member and means for periodically effecting impact of said member with a boiler'part, of means for'retarding movement of said impact member in one direction to regulate the periods between the impact strokes of saidmember; I

19. The method of removing deposits from a boiler part during operationot the boiler comprising substantialli suddenly cooling said part to cracliand loosen such deposits and subsequently jarring said part to dislodge" such deposits.

20. The methodo f removing deposits from a boiler part during operation of the boiler comprising the discharging of a cooling fluid upon said part and a subsequent jarring of said part to dislodge such deposits. i

I 21. The method of removingdeposits from a boiler part during operation of the boiler comprising discharginga fluidun'der pres sure uponthe part to cool the same and utilizing the st atic pressure of'said fluid to effeet a jarring of said part to dislodge said deposits. I

I 22, In a boiler cleaner, the combination of a plurality of impact members on a common shaft each respectively eiigage able with a boiler tube, certain of said members being adapted to engage the tubes of one row of boiler tubes, and others of saidv members'be ing adapted to engage the tubes of a second row of boiler tubes, staggered relative to the first said'row and a common means for actuating said members.

23. In a boiler cleaner, the combination with animpa'ct member, of an actuatingelement for imparting impulses to said member, said actuating element having a lost motion engagement with said member adapting said member for impact'with a boiler part under its own momentum, said impact member being insertable within the setting of the boiler and being adapted for use during the normal operation of the boiler.

24. In a boiler cleaner, the combination with a plurality ofboiler parts, of a plurality of impact members operable to impart a plu rality of successive blows to said parts, each impact member being mounted to complete each stroke under its own momentum.

In a boiler cleaner, the combination with aplurality of boiler tubes, of a supports mem r P tione acent a ub s, a p ra ity imree em s e ble t impart ow b h aid ube a means mounting the said impact members on the said supporting member, said means providing for a strikin of the said tubes by the said impact me here irrespective of slight a ons in t d s an e 0 sai tubes o said supporting member;

26. Ina boiler cleaner, the combination it a p ura ity Of i hreehmembar eng h e w th boiler p ts, 9 5 a mmon means ie uc ve? impar n plurali y of impulses to all of said members to causethe said ember o t i e e a d boil r Pa -1 sash f sa m mbe s being arrang to omp ete. each of said impact strokes'under its own momentum.

27- n a b i r, ean fer, gleaming the s a rom e e ter 0f t e boi e ub s, th .1- bination with a plurality of impact members, of a moun n fe a d mpa t ember an mean or actuating Saido nti g t mov said impact members into repeated contact th the exte ior o said oil r. b said eans be ng at d u si e. the b ile s t in 2 n a bo ler lea e a id. ond c r, an mpact m er ereon ar ang o enage a i e pa t? a d mea f t t n i o du tor, said on u r hav ng a srge n z l ar anged o d liver. a cool fluid to the boiler part substantially at the Po nt ot pa of sai impac mem e with d oi e Par a d sa d d ch rge n ebeg so ar g a pon retat e of ai n tor the. rea t ve f rce o he ool n fluid escaping from said nozzle will effect a i t n tsa d, mpa t mem er- 9= In a boiler cl ah f fo a Water ube boiler, a conduit for discharging a cooling u pon the boi er tubes, d'm e for subjecting said tubes to a succession of blows to dislodgedeposits loosened by application of said fluid while the boiler is being normaly pe a a d ean nc ud ng a plateik .v

ly operated, said, means including a plate-like impact member engageable with said; tubes, a, bearing rotatably journaling said conduit, n eans wi ly m ntin aid p t member on said bearing.

31. In a boiler cleaner for a water tube o ler, a en u t. fee ch g h w al from said nozzle will upon rotation of said 1' conduit effect a vibration of said impact member.

3-2. In a boiler cleaner for a water tube boiler, a conduit .for discharginga cooling fluid upon the boiler tubes, and means for subjecting said tubes to a succession of blows I to dislodge deposits loosened by application of said fluid while the boiler is'being normally operated, said means including an impact member, and means for mounting said impact member on said conduit, said conduit having a discharge nozzle so arranged that the reactive force of. the cleaning fluid escap ing from said nozzle will effect a vibration of said impact member.

casing, and means including a plurality of gears within said chamberadapted to be driven by the flow of the fluid through the chamber for oscillating said impactmember.

36. In a boiler cleaner, the combination with'aconductor for a cleaning fluid, of a common means mounted upon said conductor for discharging said fluid upon a boiler part during operation of the boiler and for jarring .said part to dislodge therefrom deposits loosened by said cleaning fluid, said means including an lmpact member, means supporting said mpact member from sald conductor, and

means including a pair of gears adaptedto be rotated by the flow of the fluid for oscillating saidi'impact member.

In testimony whereof we aflix our signatures.

' NORMAN L. SNOW.

FRANK BOWERS. CURTIS L. HOWSE.

33. In a boiler cleaner, the combination with a conductor for a cleaning fluid, of a common means mounted upon said conductor for discharging said fluid upon a boiler part during operation of the boiler and for'jarring said part to dislodge therefrom deposits loosened by said cleaning fluid, said means including a casing carried by said 0011-.

ductor, said casing being provided with a chamber for receiving the fluid from said conductor and being provided with a discharge nozzle for directing the fluid uponthe boiler nart.

34. In a boiler cleaner, the combinatio with a conductor for a cleaning fluid, of a common means mounted upon said conductor for discharging said fluid upon a boiler part during operation of the boiler and for jarring said part to dislodge therefrom deposits loosened by said cleaning fluid, said means including a casing carried by said conductor and providingla chamber for receiving the fluid from said conductor, an impact member carried by said casing, and means actuated by the fluid flowing through said chamber for.

oscillating said impact member. r i

35. In a boiler cleaner, the combination with a conductor for a cleaning fluid, of. a

common means mounted upon said conductor for discharging said fluid upon a boiler part during operation of the boiler'and for jarring said part to dislodge therefrom deposits loosened. by said cleaning fluid, said means in i 1 eluding a casing carried by said conductor, said casing being provided with a chamber adapted to receive the fluid fromsaidconductor and being provided with a nozzle for discharging the fluid from the chamber upon. the j boiler part, an impact member carried by said i 

